Open AccessHigh-Precision Angle Prediction of Sun for Space Remote Sensing Instrument
Author(s) -
Yan Wang,
Zhanfeng Li,
Guoqing Lin,
Haitao Yu
Publication year - 2021
Publication title -
international journal of aerospace engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.361
H-Index - 22
eISSN - 1687-5974
pISSN - 1687-5966
DOI - 10.1155/2021/8733478
Subject(s) - satellite , right ascension , coordinate system , orbit (dynamics) , calibration , remote sensing , geodesy , azimuth , declination , orbit determination , computer science , satellite system , orbital inclination , physics , aerospace engineering , optics , mathematics , gnss applications , computer vision , geology , engineering , astronomy , arithmetic , quantum mechanics , binary number
In order to grasp the timing of sun calibration in advance, this paper introduces a high-precision method to predict the solar angle by using the current broadcast time and orbital instantaneous root of the satellite platform. By calculating the sun’s apparent right ascension and apparent declination, the conversion matrix from the geocentric inertial coordinate system to the orbital coordinate system, and the satellite attitude correction matrix, the sun vector in the satellite body coordinate system is obtained. This method is used to predict the sun angle of a sun synchronous orbit in the satellite coordinate system, and the prediction results are compared with the STK simulation results. The results show that the sun angle prediction error of this method is less than ±0.003°. It can meet the requirements of on-orbit solar calibration. The main error sources in the prediction method are analysed.